Joven's Ferrets | Magic: The Gathering
Formats Joven's Ferrets is Legal in
Official Oracle Text for Joven's Ferrets
At end of combat, tap all creatures that blocked Joven's Ferrets this turn. They don't untap during their controller's next untap step.
Official Rulings for Joven's Ferrets
10/1/2008 : If a creature affected by the second ability is untapped at the time its controller's next untap step begins, the "doesn't untap" effect doesn't do anything. It won't apply at some later time when that creature is tapped.
10/1/2008 : The second ability doesn't track the creatures' controllers. If an affected creature changes controllers before its old controller's next untap step, Joven's Ferrets will prevent it from being untapped during its new controller's next untap step.